Rotate parts for suitable print direction. Glass insert slot should be adjusted for your glass thickness. Additional stuff needed: glass or plastic for combining glass. Car glass tint film (35%-50%) to darken glass. Rubber band slices. Velcro pads. Glue or double sided tape.
Insert lock studs to combine holder and glass mount. Insert tinted glass to slot. You can glue glass or wedge it in place. Glue rubber band slices to top of holder. Glue velcro pads to bottom studs or use double sided tape.